I was inside the fence for this one because I was actually shooting for the people hosting the tournament. I was right next to 3rd for the first one. And right in front of the third base side dugout for the other two (I think). I also shot a lot from the first base side. I recommend the third base side, because it yields more shots with faces in it. People aren't really running away from you.

also, I would say that softball/baseball is defintely a sport you'll need permission for to get on the field, b/c space is more restricted. However, simply having a professional looking camera can do a lot.